Add test for decimal t-shirt size

Author: farreldarian

tests/non-conflicting-classes.test.ts

@@ -3,4 +3,5 @@ import { twMerge } from '../src'
 test('merges non-conflicting classes correctly', () => {
     expect(twMerge('border-t border-white/10')).toBe('border-t border-white/10')
     expect(twMerge('border-t border-white')).toBe('border-t border-white')
+    expect(twMerge('text-3.5xl text-black')).toBe('text-3.5xl text-black')
 })

tests/validators.test.ts

@@ -103,6 +103,7 @@ describe('validators', () => {
         expect(isTshirtSize('lg')).toBe(true)
         expect(isTshirtSize('xl')).toBe(true)
         expect(isTshirtSize('2xl')).toBe(true)
+        expect(isTshirtSize('2.5xl')).toBe(true)
         expect(isTshirtSize('10xl')).toBe(true)
         expect(isTshirtSize('2xs')).toBe(true)
         expect(isTshirtSize('2lg')).toBe(true)